Zirconium Nickel Cobalt Catalyst for Amination
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Solution Overview
Problem
Existing catalysts for hydrogenative amination of aldehydes or ketones and amination of alcohols suffer from high decarbonylation rates, leading to undesirable by-products and a risk of 'runaway reactions' due to heat liberation, which reduces efficiency and increases the risk of uncontrolled temperature increases.
Innovation Solution
A catalyst composition comprising zirconium dioxide, copper, nickel, cobalt, and additional metals like Pb, Bi, Sn, or In, with specific weight percentages and ratios, is used to reduce decarbonylation and enhance mechanical stability, allowing for higher activity and selectivity in the amination process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional catalysts (Cu/Ni/Zr/Sn) are used for hydrogenative amination, then high activity and selectivity are achieved, but decarbonylation occurs leading to undesirable by-products and runaway reactions
Solution Approach 1:
The patent changes the chemical composition parameters of the catalyst by introducing specific metal combinations (Cu/Ni/Zr/Sn) and controlling their ratios. This parameter change modifies the catalyst's selectivity to favor amination over decarbonylation, reducing harmful by-products while maintaining high productivity
Solution Approach 2:
The patent employs a composite catalyst material comprising multiple metal components (copper, nickel, zirconium, tin) in specific proportions. This composite structure creates synergistic effects that enhance both activity and selectivity while suppressing decarbonylation reactions, resolving the contradiction between productivity and harmful by-product formation
2Productivity
If conventional catalysts are used to achieve high conversion, then amination reaction proceeds efficiently, but heat liberation causes runaway reactions
Solution Approach 1:
The patent modifies the catalyst composition parameters to optimize the reaction pathway, reducing exothermic heat liberation during the amination process. This parameter change allows high conversion rates to be achieved with better temperature control, preventing runaway reactions while maintaining productivity
Solution Approach 2:
The patent converts the potentially harmful effect of heat liberation into a beneficial controlled exothermic reaction by optimizing the catalyst composition. The modified catalyst structure ensures that heat is released in a controlled manner that supports high conversion while maintaining temperature stability and process safety
3Productivity
If catalyst operating life is extended, then productivity increases, but mechanical stability deteriorates
Solution Approach 1:
The patent uses a composite catalyst material with specific metal combinations (Cu/Ni/Zr/Sn) that provide both high activity and mechanical stability. The multi-component structure creates a robust catalyst that maintains its physical integrity over extended operating periods, resolving the contradiction between prolonged productivity and mechanical strength
Solution Approach 2:
The patent optimizes the compositional parameters of the catalyst, particularly the ratios of metals and support materials, to enhance mechanical stability. This parameter optimization ensures that the catalyst maintains its structural integrity and activity over extended operating lives, allowing prolonged productivity without sacrificing mechanical strength
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalysts maintain high activity and selectivity while reducing undesirable decarbonylation, thereby increasing the yield and mechanical stability, and lowering the risk of 'runaway reactions', thus improving the overall process efficiency and safety.
Implementation Method 1
catalysts comprising zirconium dioxide and nickel... for the hydrogenative amination of aldehydes or ketones and for the amination of alcohols
Implementation Method 2
reduce decarbonylation... leading to undesirable by-products
Implementation Method 3
heat liberation... risk of 'runaway reactions' due to heat liberation
Data Source
AI summary
A catalytically active composition comprising, prior to reduction with hydrogen: 10 to 75% by weight of an oxygen compound of zirconium, calculated as ZrO2; 1 to 30% by weight of an oxygen compound of copper, calculated as CuO; 10 to 50% by weight of an oxygen compound of nickel, calculated as NiO; 10 to 50% by weight of an oxygen compound of cobalt, calculated as CoO; and 0.1 to 10% by weight of one or more oxygen compounds of one or more metals selected from the group consisting of Pb, Bi, Sn, Sb and In, calculated as PbO, Bi2O3, SnO, Sb2O3 or In2O3, respectively.